Former New York Mayor Rudy Giuliani praised New Jersey Gov. Chris Christie for holding “people accountable who were responsible” for the “stupid” bridge lane closings — adding that’s something President Barack Obama “failed to do with Benghazi” and “failed to do with the IRS.”

An ad calling for the abolishment of the IRS incorrectly claimed that the federal agency’s budget increased by $2 billion. In fact, it’s down by nearly $1 billion during President Barack Obama’s first term.

The Internal Revenue Service is not exactly an “independent agency,” as President Obama claimed during a May 13 press conference. In fact, it is a bureau of the Treasury Department, an executive agency within the federal government.

A conservative group misleads taxpayers on the Affordable Care Act and the Internal Revenue Service’s future role in enforcing it. Americans for Tax Reform posted a “projected” IRS tax form on its website that claims to “help families and tax specialists prepare” for new tax provisions under the health care law. But ATR makes several false claims:

The group claims taxpayers will have to disclose “personal identifying health information” to the IRS to prove they have insurance.

Up next in our look at past claims made by the 2012 presidential candidates: Rep. Ron Paul. No stranger to presidential campaigns, the Texas Republican has made his share of factual flubs. Paul declared his 2012 candidacy May 13.

He falsely claimed last December that the estate tax "especially harms small and family-owned businesses." But if the estate tax was returned to 2009 levels, less than 8 percent of estates taxed in 2011 would be family farms and businesses,